Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model
文献类型：期刊论文
| 作者 | Shang, Lun-Hua1,2; Lu, Ji-Guang3,4; Du, Yuan-Jie5; Hao LF(郝龙飞)6 ; Li, Di2; Lee, Ke-Jia7; Li, Bin8,9; Li, Li-Xin7; Qiao, Guo-Jun3; Shen, Zhi-Qiang8,9
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2017-07-01 |
| 卷号 | 468期号:4页码:4389-4398 |
| ISSN号 | 0035-8711 |
| 关键词 | radiation mechanisms: non-thermal stars: magnetic field stars: neutron pulsars: individual: PSR B0329+54 pulsars: individual: PSR B1642-03 |
| 通讯作者 | Shang, Lun-Hua(Guizhou Normal Univ, Sch Phys & Elect Sci, 116 Baoshan Rd, Guiyang 550001, Peoples R China) |
| 产权排序 | 第6完成单位 |
| 英文摘要 | Emission geometries, including emission region heights, beam shapes and radius-to-frequency mapping, are important clues for pulsar radiation models. Multiband radio observations reveal this valuable information. In this paper, we study two bright pulsars, PSRs B0329+54 and B1642-03, and observe them at high frequencies: 2.5, 5 and 8 GHz. The newly acquired data, together with historical archives, provide an atlas of multifrequency profiles spanning from 100 MHz to 10 GHz. We study the frequency evolution of pulse profiles as well as radiation regions using these data. First, we fit the pulse profiles with Gaussian functions to determine the phase of each component, and then we calculate the radiation altitudes of different emission components and radiation regions. We find that the inverse Compton scattering (ICS) model can reproduce the radiation geometry of these two pulsars. However, for PSR B0329+54, the radiation can be generated in either an annular gap (AG) or a core gap (CG), while the radiation of PSR B1642-03 can only be generated in a CG. This difference is caused by the inclination angle and the impact angle of these two pulsars. The relationship between the beaming angle (the angle between the radiation direction and the magnetic axis) and the radiation altitude versus frequency is also presented by modelling the beam-frequency evolution in the ICS model. The multiband pulse profiles of these two pulsars can be described well by the ICS model combined with the CG and AG. |
| 学科主题 | 天文学 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | GAMMA-RAY EMISSION ; MULTICOMPONENT GAUSSIAN FITS ; INNER ANNULAR GAP ; RADIO PULSARS ; WIDTH STATISTICS ; GEOMETRICAL ANALYSIS ; CURVATURE RADIATION ; INTEGRATED PROFILES ; MILLISECOND PULSARS ; HIGH-FREQUENCIES |
| 收录类别 | SCI |
| 原文出处 | https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx815 |
| 语种 | 英语 |
| WOS记录号 | WOS:000402819700049 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/10089]  |
| 专题 | 云南天文台_射电天文研究组 |
| 作者单位 | 1.School of Physics and Electronic Science, Guizhou Normal University, 116 Baoshan Road, Yunyan Distric, Guiyang 550001, China 2.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, China 3.School of Physics, Peking University, 5 Yiheyuan Road, Haidian District, Beijing 100871, China 4.State Key Laboratory of Nuclear Science and Technology, Peking University, 5 Yiheyuan Road, Haidian District, Beijing 100871, China 5.Qian Xuesen Laboratory of Space Technology, 104 Youyi Road, Haidian District, Beijing 100094, China 6.Yunnan Astronomical Observatory, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650011, China 7.Kavil Institute for Astronomy and Astrophysics, Peking University, 5 Yiheyuan Road, Haidian District, Beijing 100871, China 8.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China 9.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China 10.Center of Astronomical Research and Education, NAOC·GZNU, 116 Baoshan Road, Yunyan Distric, Guiyang 550001, China |
| 推荐引用方式 GB/T 7714 | Shang, Lun-Hua,Lu, Ji-Guang,Du, Yuan-Jie,et al. Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,468(4):4389-4398. |
| APA | Shang, Lun-Hua.,Lu, Ji-Guang.,Du, Yuan-Jie.,Hao LF.,Li, Di.,...&Zhao, Ru-Shuang.(2017).Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,468(4),4389-4398. |
| MLA | Shang, Lun-Hua,et al."Investigating the multifrequency pulse profiles of PSRs B0329+54 and B1642-03 in an inverse Compton scattering model".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 468.4(2017):4389-4398. |
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来源：云南天文台
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